1 /**************************************************************** 2 * 3 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet 4 * 5 * (c) 2000 Interlan Communications 6 * (c) 2000 Stephane Alnet 7 * (C) 2001 Brad Hards 8 * (C) 2002 Oliver Neukum 9 * 10 * Original author: The Zapman <zapman@interlan.net> 11 * Inspired by, and much credit goes to Michael Rothwell 12 * <rothwell@interlan.net> for the test equipment, help, and patience 13 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver. 14 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki 15 * for providing the firmware and driver resources. 16 * 17 * This program is free software; you can redistribute it and/or 18 * modify it under the terms of the GNU General Public License as 19 * published by the Free Software Foundation; either version 2, or 20 * (at your option) any later version. 21 * 22 * This program is distributed in the hope that it will be useful, 23 * but WITHOUT ANY WARRANTY; without even the implied warranty of 24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 * GNU General Public License for more details. 26 * 27 * You should have received a copy of the GNU General Public License 28 * along with this program; if not, write to the Free Software Foundation, 29 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 30 * 31 ****************************************************************/ 32 33 /* TODO: 34 * Develop test procedures for USB net interfaces 35 * Run test procedures 36 * Fix bugs from previous two steps 37 * Snoop other OSs for any tricks we're not doing 38 * Reduce arbitrary timeouts 39 * Smart multicast support 40 * Temporary MAC change support 41 * Tunable SOFs parameter - ioctl()? 42 * Ethernet stats collection 43 * Code formatting improvements 44 */ 45 46 #include <linux/module.h> 47 #include <linux/slab.h> 48 #include <linux/string.h> 49 #include <linux/init.h> 50 #include <linux/delay.h> 51 #include <linux/netdevice.h> 52 #include <linux/etherdevice.h> 53 #include <linux/usb.h> 54 #include <linux/types.h> 55 #include <linux/ethtool.h> 56 #include <linux/dma-mapping.h> 57 #include <linux/wait.h> 58 #include <linux/firmware.h> 59 #include <asm/uaccess.h> 60 #include <asm/byteorder.h> 61 62 #undef DEBUG 63 64 #define KAWETH_MTU 1514 65 #define KAWETH_BUF_SIZE 1664 66 #define KAWETH_TX_TIMEOUT (5 * HZ) 67 #define KAWETH_SCRATCH_SIZE 32 68 #define KAWETH_FIRMWARE_BUF_SIZE 4096 69 #define KAWETH_CONTROL_TIMEOUT (30000) 70 71 #define KAWETH_STATUS_BROKEN 0x0000001 72 #define KAWETH_STATUS_CLOSING 0x0000002 73 #define KAWETH_STATUS_SUSPENDING 0x0000004 74 75 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING) 76 77 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01 78 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02 79 #define KAWETH_PACKET_FILTER_DIRECTED 0x04 80 #define KAWETH_PACKET_FILTER_BROADCAST 0x08 81 #define KAWETH_PACKET_FILTER_MULTICAST 0x10 82 83 /* Table 7 */ 84 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00 85 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01 86 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02 87 #define KAWETH_COMMAND_STATISTICS 0x03 88 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06 89 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07 90 #define KAWETH_COMMAND_SET_URB_SIZE 0x08 91 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09 92 #define KAWETH_COMMAND_SCAN 0xFF 93 94 #define KAWETH_SOFS_TO_WAIT 0x05 95 96 #define INTBUFFERSIZE 4 97 98 #define STATE_OFFSET 0 99 #define STATE_MASK 0x40 100 #define STATE_SHIFT 5 101 102 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED) 103 104 105 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>"); 106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver"); 107 MODULE_LICENSE("GPL"); 108 MODULE_FIRMWARE("kaweth/new_code.bin"); 109 MODULE_FIRMWARE("kaweth/new_code_fix.bin"); 110 MODULE_FIRMWARE("kaweth/trigger_code.bin"); 111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin"); 112 113 static const char driver_name[] = "kaweth"; 114 115 static int kaweth_probe( 116 struct usb_interface *intf, 117 const struct usb_device_id *id /* from id_table */ 118 ); 119 static void kaweth_disconnect(struct usb_interface *intf); 120 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 121 unsigned int pipe, 122 struct usb_ctrlrequest *cmd, void *data, 123 int len, int timeout); 124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message); 125 static int kaweth_resume(struct usb_interface *intf); 126 127 /**************************************************************** 128 * usb_device_id 129 ****************************************************************/ 130 static struct usb_device_id usb_klsi_table[] = { 131 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */ 132 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */ 133 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */ 134 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */ 135 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */ 136 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */ 137 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */ 138 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */ 139 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */ 140 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */ 141 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */ 142 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */ 143 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */ 144 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */ 145 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */ 146 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */ 147 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */ 148 { USB_DEVICE(0x07c9, 0xb010) }, /* Allied Telesyn AT-USB10 USB Ethernet Adapter */ 149 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */ 150 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */ 151 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */ 152 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */ 153 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */ 154 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */ 155 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */ 156 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */ 157 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */ 158 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */ 159 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */ 160 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */ 161 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */ 162 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */ 163 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */ 164 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */ 165 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */ 166 {} /* Null terminator */ 167 }; 168 169 MODULE_DEVICE_TABLE (usb, usb_klsi_table); 170 171 /**************************************************************** 172 * kaweth_driver 173 ****************************************************************/ 174 static struct usb_driver kaweth_driver = { 175 .name = driver_name, 176 .probe = kaweth_probe, 177 .disconnect = kaweth_disconnect, 178 .suspend = kaweth_suspend, 179 .resume = kaweth_resume, 180 .id_table = usb_klsi_table, 181 .supports_autosuspend = 1, 182 }; 183 184 typedef __u8 eth_addr_t[6]; 185 186 /**************************************************************** 187 * usb_eth_dev 188 ****************************************************************/ 189 struct usb_eth_dev { 190 char *name; 191 __u16 vendor; 192 __u16 device; 193 void *pdata; 194 }; 195 196 /**************************************************************** 197 * kaweth_ethernet_configuration 198 * Refer Table 8 199 ****************************************************************/ 200 struct kaweth_ethernet_configuration 201 { 202 __u8 size; 203 __u8 reserved1; 204 __u8 reserved2; 205 eth_addr_t hw_addr; 206 __u32 statistics_mask; 207 __le16 segment_size; 208 __u16 max_multicast_filters; 209 __u8 reserved3; 210 } __packed; 211 212 /**************************************************************** 213 * kaweth_device 214 ****************************************************************/ 215 struct kaweth_device 216 { 217 spinlock_t device_lock; 218 219 __u32 status; 220 int end; 221 int suspend_lowmem_rx; 222 int suspend_lowmem_ctrl; 223 int linkstate; 224 int opened; 225 struct delayed_work lowmem_work; 226 227 struct usb_device *dev; 228 struct usb_interface *intf; 229 struct net_device *net; 230 wait_queue_head_t term_wait; 231 232 struct urb *rx_urb; 233 struct urb *tx_urb; 234 struct urb *irq_urb; 235 236 dma_addr_t intbufferhandle; 237 __u8 *intbuffer; 238 dma_addr_t rxbufferhandle; 239 __u8 *rx_buf; 240 241 242 struct sk_buff *tx_skb; 243 244 __u8 *firmware_buf; 245 __u8 scratch[KAWETH_SCRATCH_SIZE]; 246 __u16 packet_filter_bitmap; 247 248 struct kaweth_ethernet_configuration configuration; 249 250 struct net_device_stats stats; 251 }; 252 253 /**************************************************************** 254 * kaweth_control 255 ****************************************************************/ 256 static int kaweth_control(struct kaweth_device *kaweth, 257 unsigned int pipe, 258 __u8 request, 259 __u8 requesttype, 260 __u16 value, 261 __u16 index, 262 void *data, 263 __u16 size, 264 int timeout) 265 { 266 struct usb_ctrlrequest *dr; 267 int retval; 268 269 dbg("kaweth_control()"); 270 271 if(in_interrupt()) { 272 dbg("in_interrupt()"); 273 return -EBUSY; 274 } 275 276 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC); 277 278 if (!dr) { 279 dbg("kmalloc() failed"); 280 return -ENOMEM; 281 } 282 283 dr->bRequestType = requesttype; 284 dr->bRequest = request; 285 dr->wValue = cpu_to_le16(value); 286 dr->wIndex = cpu_to_le16(index); 287 dr->wLength = cpu_to_le16(size); 288 289 retval = kaweth_internal_control_msg(kaweth->dev, 290 pipe, 291 dr, 292 data, 293 size, 294 timeout); 295 296 kfree(dr); 297 return retval; 298 } 299 300 /**************************************************************** 301 * kaweth_read_configuration 302 ****************************************************************/ 303 static int kaweth_read_configuration(struct kaweth_device *kaweth) 304 { 305 int retval; 306 307 dbg("Reading kaweth configuration"); 308 309 retval = kaweth_control(kaweth, 310 usb_rcvctrlpipe(kaweth->dev, 0), 311 KAWETH_COMMAND_GET_ETHERNET_DESC, 312 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE, 313 0, 314 0, 315 (void *)&kaweth->configuration, 316 sizeof(kaweth->configuration), 317 KAWETH_CONTROL_TIMEOUT); 318 319 return retval; 320 } 321 322 /**************************************************************** 323 * kaweth_set_urb_size 324 ****************************************************************/ 325 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size) 326 { 327 int retval; 328 329 dbg("Setting URB size to %d", (unsigned)urb_size); 330 331 retval = kaweth_control(kaweth, 332 usb_sndctrlpipe(kaweth->dev, 0), 333 KAWETH_COMMAND_SET_URB_SIZE, 334 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 335 urb_size, 336 0, 337 (void *)&kaweth->scratch, 338 0, 339 KAWETH_CONTROL_TIMEOUT); 340 341 return retval; 342 } 343 344 /**************************************************************** 345 * kaweth_set_sofs_wait 346 ****************************************************************/ 347 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait) 348 { 349 int retval; 350 351 dbg("Set SOFS wait to %d", (unsigned)sofs_wait); 352 353 retval = kaweth_control(kaweth, 354 usb_sndctrlpipe(kaweth->dev, 0), 355 KAWETH_COMMAND_SET_SOFS_WAIT, 356 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 357 sofs_wait, 358 0, 359 (void *)&kaweth->scratch, 360 0, 361 KAWETH_CONTROL_TIMEOUT); 362 363 return retval; 364 } 365 366 /**************************************************************** 367 * kaweth_set_receive_filter 368 ****************************************************************/ 369 static int kaweth_set_receive_filter(struct kaweth_device *kaweth, 370 __u16 receive_filter) 371 { 372 int retval; 373 374 dbg("Set receive filter to %d", (unsigned)receive_filter); 375 376 retval = kaweth_control(kaweth, 377 usb_sndctrlpipe(kaweth->dev, 0), 378 KAWETH_COMMAND_SET_PACKET_FILTER, 379 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 380 receive_filter, 381 0, 382 (void *)&kaweth->scratch, 383 0, 384 KAWETH_CONTROL_TIMEOUT); 385 386 return retval; 387 } 388 389 /**************************************************************** 390 * kaweth_download_firmware 391 ****************************************************************/ 392 static int kaweth_download_firmware(struct kaweth_device *kaweth, 393 const char *fwname, 394 __u8 interrupt, 395 __u8 type) 396 { 397 const struct firmware *fw; 398 int data_len; 399 int ret; 400 401 ret = request_firmware(&fw, fwname, &kaweth->dev->dev); 402 if (ret) { 403 err("Firmware request failed\n"); 404 return ret; 405 } 406 407 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) { 408 err("Firmware too big: %zu", fw->size); 409 release_firmware(fw); 410 return -ENOSPC; 411 } 412 data_len = fw->size; 413 memcpy(kaweth->firmware_buf, fw->data, fw->size); 414 415 release_firmware(fw); 416 417 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7; 418 kaweth->firmware_buf[3] = data_len >> 8; 419 kaweth->firmware_buf[4] = type; 420 kaweth->firmware_buf[5] = interrupt; 421 422 dbg("High: %i, Low:%i", kaweth->firmware_buf[3], 423 kaweth->firmware_buf[2]); 424 425 dbg("Downloading firmware at %p to kaweth device at %p", 426 fw->data, kaweth); 427 dbg("Firmware length: %d", data_len); 428 429 return kaweth_control(kaweth, 430 usb_sndctrlpipe(kaweth->dev, 0), 431 KAWETH_COMMAND_SCAN, 432 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 433 0, 434 0, 435 (void *)kaweth->firmware_buf, 436 data_len, 437 KAWETH_CONTROL_TIMEOUT); 438 } 439 440 /**************************************************************** 441 * kaweth_trigger_firmware 442 ****************************************************************/ 443 static int kaweth_trigger_firmware(struct kaweth_device *kaweth, 444 __u8 interrupt) 445 { 446 kaweth->firmware_buf[0] = 0xB6; 447 kaweth->firmware_buf[1] = 0xC3; 448 kaweth->firmware_buf[2] = 0x01; 449 kaweth->firmware_buf[3] = 0x00; 450 kaweth->firmware_buf[4] = 0x06; 451 kaweth->firmware_buf[5] = interrupt; 452 kaweth->firmware_buf[6] = 0x00; 453 kaweth->firmware_buf[7] = 0x00; 454 455 dbg("Triggering firmware"); 456 457 return kaweth_control(kaweth, 458 usb_sndctrlpipe(kaweth->dev, 0), 459 KAWETH_COMMAND_SCAN, 460 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 461 0, 462 0, 463 (void *)kaweth->firmware_buf, 464 8, 465 KAWETH_CONTROL_TIMEOUT); 466 } 467 468 /**************************************************************** 469 * kaweth_reset 470 ****************************************************************/ 471 static int kaweth_reset(struct kaweth_device *kaweth) 472 { 473 int result; 474 475 dbg("kaweth_reset(%p)", kaweth); 476 result = usb_reset_configuration(kaweth->dev); 477 mdelay(10); 478 479 dbg("kaweth_reset() returns %d.",result); 480 481 return result; 482 } 483 484 static void kaweth_usb_receive(struct urb *); 485 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t); 486 487 /**************************************************************** 488 int_callback 489 *****************************************************************/ 490 491 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf) 492 { 493 int status; 494 495 status = usb_submit_urb (kaweth->irq_urb, mf); 496 if (unlikely(status == -ENOMEM)) { 497 kaweth->suspend_lowmem_ctrl = 1; 498 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 499 } else { 500 kaweth->suspend_lowmem_ctrl = 0; 501 } 502 503 if (status) 504 err ("can't resubmit intr, %s-%s, status %d", 505 kaweth->dev->bus->bus_name, 506 kaweth->dev->devpath, status); 507 } 508 509 static void int_callback(struct urb *u) 510 { 511 struct kaweth_device *kaweth = u->context; 512 int act_state; 513 int status = u->status; 514 515 switch (status) { 516 case 0: /* success */ 517 break; 518 case -ECONNRESET: /* unlink */ 519 case -ENOENT: 520 case -ESHUTDOWN: 521 return; 522 /* -EPIPE: should clear the halt */ 523 default: /* error */ 524 goto resubmit; 525 } 526 527 /* we check the link state to report changes */ 528 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) { 529 if (act_state) 530 netif_carrier_on(kaweth->net); 531 else 532 netif_carrier_off(kaweth->net); 533 534 kaweth->linkstate = act_state; 535 } 536 resubmit: 537 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC); 538 } 539 540 static void kaweth_resubmit_tl(struct work_struct *work) 541 { 542 struct kaweth_device *kaweth = 543 container_of(work, struct kaweth_device, lowmem_work.work); 544 545 if (IS_BLOCKED(kaweth->status)) 546 return; 547 548 if (kaweth->suspend_lowmem_rx) 549 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 550 551 if (kaweth->suspend_lowmem_ctrl) 552 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 553 } 554 555 556 /**************************************************************** 557 * kaweth_resubmit_rx_urb 558 ****************************************************************/ 559 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth, 560 gfp_t mem_flags) 561 { 562 int result; 563 564 usb_fill_bulk_urb(kaweth->rx_urb, 565 kaweth->dev, 566 usb_rcvbulkpipe(kaweth->dev, 1), 567 kaweth->rx_buf, 568 KAWETH_BUF_SIZE, 569 kaweth_usb_receive, 570 kaweth); 571 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 572 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle; 573 574 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) { 575 if (result == -ENOMEM) { 576 kaweth->suspend_lowmem_rx = 1; 577 schedule_delayed_work(&kaweth->lowmem_work, HZ/4); 578 } 579 err("resubmitting rx_urb %d failed", result); 580 } else { 581 kaweth->suspend_lowmem_rx = 0; 582 } 583 584 return result; 585 } 586 587 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth); 588 589 /**************************************************************** 590 * kaweth_usb_receive 591 ****************************************************************/ 592 static void kaweth_usb_receive(struct urb *urb) 593 { 594 struct kaweth_device *kaweth = urb->context; 595 struct net_device *net = kaweth->net; 596 int status = urb->status; 597 598 int count = urb->actual_length; 599 int count2 = urb->transfer_buffer_length; 600 601 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf); 602 603 struct sk_buff *skb; 604 605 if (unlikely(status == -EPIPE)) { 606 kaweth->stats.rx_errors++; 607 kaweth->end = 1; 608 wake_up(&kaweth->term_wait); 609 dbg("Status was -EPIPE."); 610 return; 611 } 612 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) { 613 /* we are killed - set a flag and wake the disconnect handler */ 614 kaweth->end = 1; 615 wake_up(&kaweth->term_wait); 616 dbg("Status was -ECONNRESET or -ESHUTDOWN."); 617 return; 618 } 619 if (unlikely(status == -EPROTO || status == -ETIME || 620 status == -EILSEQ)) { 621 kaweth->stats.rx_errors++; 622 dbg("Status was -EPROTO, -ETIME, or -EILSEQ."); 623 return; 624 } 625 if (unlikely(status == -EOVERFLOW)) { 626 kaweth->stats.rx_errors++; 627 dbg("Status was -EOVERFLOW."); 628 } 629 spin_lock(&kaweth->device_lock); 630 if (IS_BLOCKED(kaweth->status)) { 631 spin_unlock(&kaweth->device_lock); 632 return; 633 } 634 spin_unlock(&kaweth->device_lock); 635 636 if(status && status != -EREMOTEIO && count != 1) { 637 err("%s RX status: %d count: %d packet_len: %d", 638 net->name, 639 status, 640 count, 641 (int)pkt_len); 642 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 643 return; 644 } 645 646 if(kaweth->net && (count > 2)) { 647 if(pkt_len > (count - 2)) { 648 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count); 649 err("Packet len & 2047: %x", pkt_len & 2047); 650 err("Count 2: %x", count2); 651 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 652 return; 653 } 654 655 if(!(skb = dev_alloc_skb(pkt_len+2))) { 656 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 657 return; 658 } 659 660 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */ 661 662 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len); 663 664 skb_put(skb, pkt_len); 665 666 skb->protocol = eth_type_trans(skb, net); 667 668 netif_rx(skb); 669 670 kaweth->stats.rx_packets++; 671 kaweth->stats.rx_bytes += pkt_len; 672 } 673 674 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC); 675 } 676 677 /**************************************************************** 678 * kaweth_open 679 ****************************************************************/ 680 static int kaweth_open(struct net_device *net) 681 { 682 struct kaweth_device *kaweth = netdev_priv(net); 683 int res; 684 685 dbg("Opening network device."); 686 687 res = usb_autopm_get_interface(kaweth->intf); 688 if (res) { 689 err("Interface cannot be resumed."); 690 return -EIO; 691 } 692 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL); 693 if (res) 694 goto err_out; 695 696 usb_fill_int_urb( 697 kaweth->irq_urb, 698 kaweth->dev, 699 usb_rcvintpipe(kaweth->dev, 3), 700 kaweth->intbuffer, 701 INTBUFFERSIZE, 702 int_callback, 703 kaweth, 704 250); /* overriding the descriptor */ 705 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle; 706 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 707 708 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL); 709 if (res) { 710 usb_kill_urb(kaweth->rx_urb); 711 goto err_out; 712 } 713 kaweth->opened = 1; 714 715 netif_start_queue(net); 716 717 kaweth_async_set_rx_mode(kaweth); 718 return 0; 719 720 err_out: 721 usb_autopm_put_interface(kaweth->intf); 722 return -EIO; 723 } 724 725 /**************************************************************** 726 * kaweth_kill_urbs 727 ****************************************************************/ 728 static void kaweth_kill_urbs(struct kaweth_device *kaweth) 729 { 730 usb_kill_urb(kaweth->irq_urb); 731 usb_kill_urb(kaweth->rx_urb); 732 usb_kill_urb(kaweth->tx_urb); 733 734 cancel_delayed_work_sync(&kaweth->lowmem_work); 735 736 /* a scheduled work may have resubmitted, 737 we hit them again */ 738 usb_kill_urb(kaweth->irq_urb); 739 usb_kill_urb(kaweth->rx_urb); 740 } 741 742 /**************************************************************** 743 * kaweth_close 744 ****************************************************************/ 745 static int kaweth_close(struct net_device *net) 746 { 747 struct kaweth_device *kaweth = netdev_priv(net); 748 749 netif_stop_queue(net); 750 kaweth->opened = 0; 751 752 kaweth->status |= KAWETH_STATUS_CLOSING; 753 754 kaweth_kill_urbs(kaweth); 755 756 kaweth->status &= ~KAWETH_STATUS_CLOSING; 757 758 usb_autopm_put_interface(kaweth->intf); 759 760 return 0; 761 } 762 763 static u32 kaweth_get_link(struct net_device *dev) 764 { 765 struct kaweth_device *kaweth = netdev_priv(dev); 766 767 return kaweth->linkstate; 768 } 769 770 static const struct ethtool_ops ops = { 771 .get_link = kaweth_get_link 772 }; 773 774 /**************************************************************** 775 * kaweth_usb_transmit_complete 776 ****************************************************************/ 777 static void kaweth_usb_transmit_complete(struct urb *urb) 778 { 779 struct kaweth_device *kaweth = urb->context; 780 struct sk_buff *skb = kaweth->tx_skb; 781 int status = urb->status; 782 783 if (unlikely(status != 0)) 784 if (status != -ENOENT) 785 dbg("%s: TX status %d.", kaweth->net->name, status); 786 787 netif_wake_queue(kaweth->net); 788 dev_kfree_skb_irq(skb); 789 } 790 791 /**************************************************************** 792 * kaweth_start_xmit 793 ****************************************************************/ 794 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb, 795 struct net_device *net) 796 { 797 struct kaweth_device *kaweth = netdev_priv(net); 798 __le16 *private_header; 799 800 int res; 801 802 spin_lock_irq(&kaweth->device_lock); 803 804 kaweth_async_set_rx_mode(kaweth); 805 netif_stop_queue(net); 806 if (IS_BLOCKED(kaweth->status)) { 807 goto skip; 808 } 809 810 /* We now decide whether we can put our special header into the sk_buff */ 811 if (skb_cloned(skb) || skb_headroom(skb) < 2) { 812 /* no such luck - we make our own */ 813 struct sk_buff *copied_skb; 814 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC); 815 dev_kfree_skb_irq(skb); 816 skb = copied_skb; 817 if (!copied_skb) { 818 kaweth->stats.tx_errors++; 819 netif_start_queue(net); 820 spin_unlock_irq(&kaweth->device_lock); 821 return NETDEV_TX_OK; 822 } 823 } 824 825 private_header = (__le16 *)__skb_push(skb, 2); 826 *private_header = cpu_to_le16(skb->len-2); 827 kaweth->tx_skb = skb; 828 829 usb_fill_bulk_urb(kaweth->tx_urb, 830 kaweth->dev, 831 usb_sndbulkpipe(kaweth->dev, 2), 832 private_header, 833 skb->len, 834 kaweth_usb_transmit_complete, 835 kaweth); 836 kaweth->end = 0; 837 838 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC))) 839 { 840 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res); 841 skip: 842 kaweth->stats.tx_errors++; 843 844 netif_start_queue(net); 845 dev_kfree_skb_irq(skb); 846 } 847 else 848 { 849 kaweth->stats.tx_packets++; 850 kaweth->stats.tx_bytes += skb->len; 851 } 852 853 spin_unlock_irq(&kaweth->device_lock); 854 855 return NETDEV_TX_OK; 856 } 857 858 /**************************************************************** 859 * kaweth_set_rx_mode 860 ****************************************************************/ 861 static void kaweth_set_rx_mode(struct net_device *net) 862 { 863 struct kaweth_device *kaweth = netdev_priv(net); 864 865 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED | 866 KAWETH_PACKET_FILTER_BROADCAST | 867 KAWETH_PACKET_FILTER_MULTICAST; 868 869 dbg("Setting Rx mode to %d", packet_filter_bitmap); 870 871 netif_stop_queue(net); 872 873 if (net->flags & IFF_PROMISC) { 874 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS; 875 } 876 else if (!netdev_mc_empty(net) || (net->flags & IFF_ALLMULTI)) { 877 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST; 878 } 879 880 kaweth->packet_filter_bitmap = packet_filter_bitmap; 881 netif_wake_queue(net); 882 } 883 884 /**************************************************************** 885 * kaweth_async_set_rx_mode 886 ****************************************************************/ 887 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth) 888 { 889 int result; 890 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap; 891 892 kaweth->packet_filter_bitmap = 0; 893 if (packet_filter_bitmap == 0) 894 return; 895 896 if (in_interrupt()) 897 return; 898 899 result = kaweth_control(kaweth, 900 usb_sndctrlpipe(kaweth->dev, 0), 901 KAWETH_COMMAND_SET_PACKET_FILTER, 902 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE, 903 packet_filter_bitmap, 904 0, 905 (void *)&kaweth->scratch, 906 0, 907 KAWETH_CONTROL_TIMEOUT); 908 909 if(result < 0) { 910 err("Failed to set Rx mode: %d", result); 911 } 912 else { 913 dbg("Set Rx mode to %d", packet_filter_bitmap); 914 } 915 } 916 917 /**************************************************************** 918 * kaweth_netdev_stats 919 ****************************************************************/ 920 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev) 921 { 922 struct kaweth_device *kaweth = netdev_priv(dev); 923 return &kaweth->stats; 924 } 925 926 /**************************************************************** 927 * kaweth_tx_timeout 928 ****************************************************************/ 929 static void kaweth_tx_timeout(struct net_device *net) 930 { 931 struct kaweth_device *kaweth = netdev_priv(net); 932 933 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name); 934 kaweth->stats.tx_errors++; 935 net->trans_start = jiffies; 936 937 usb_unlink_urb(kaweth->tx_urb); 938 } 939 940 /**************************************************************** 941 * kaweth_suspend 942 ****************************************************************/ 943 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message) 944 { 945 struct kaweth_device *kaweth = usb_get_intfdata(intf); 946 unsigned long flags; 947 948 dbg("Suspending device"); 949 spin_lock_irqsave(&kaweth->device_lock, flags); 950 kaweth->status |= KAWETH_STATUS_SUSPENDING; 951 spin_unlock_irqrestore(&kaweth->device_lock, flags); 952 953 kaweth_kill_urbs(kaweth); 954 return 0; 955 } 956 957 /**************************************************************** 958 * kaweth_resume 959 ****************************************************************/ 960 static int kaweth_resume(struct usb_interface *intf) 961 { 962 struct kaweth_device *kaweth = usb_get_intfdata(intf); 963 unsigned long flags; 964 965 dbg("Resuming device"); 966 spin_lock_irqsave(&kaweth->device_lock, flags); 967 kaweth->status &= ~KAWETH_STATUS_SUSPENDING; 968 spin_unlock_irqrestore(&kaweth->device_lock, flags); 969 970 if (!kaweth->opened) 971 return 0; 972 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO); 973 kaweth_resubmit_int_urb(kaweth, GFP_NOIO); 974 975 return 0; 976 } 977 978 /**************************************************************** 979 * kaweth_probe 980 ****************************************************************/ 981 982 983 static const struct net_device_ops kaweth_netdev_ops = { 984 .ndo_open = kaweth_open, 985 .ndo_stop = kaweth_close, 986 .ndo_start_xmit = kaweth_start_xmit, 987 .ndo_tx_timeout = kaweth_tx_timeout, 988 .ndo_set_rx_mode = kaweth_set_rx_mode, 989 .ndo_get_stats = kaweth_netdev_stats, 990 .ndo_change_mtu = eth_change_mtu, 991 .ndo_set_mac_address = eth_mac_addr, 992 .ndo_validate_addr = eth_validate_addr, 993 }; 994 995 static int kaweth_probe( 996 struct usb_interface *intf, 997 const struct usb_device_id *id /* from id_table */ 998 ) 999 { 1000 struct usb_device *dev = interface_to_usbdev(intf); 1001 struct kaweth_device *kaweth; 1002 struct net_device *netdev; 1003 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }; 1004 int result = 0; 1005 1006 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x", 1007 dev->devnum, 1008 le16_to_cpu(dev->descriptor.idVendor), 1009 le16_to_cpu(dev->descriptor.idProduct), 1010 le16_to_cpu(dev->descriptor.bcdDevice)); 1011 1012 dbg("Device at %p", dev); 1013 1014 dbg("Descriptor length: %x type: %x", 1015 (int)dev->descriptor.bLength, 1016 (int)dev->descriptor.bDescriptorType); 1017 1018 netdev = alloc_etherdev(sizeof(*kaweth)); 1019 if (!netdev) 1020 return -ENOMEM; 1021 1022 kaweth = netdev_priv(netdev); 1023 kaweth->dev = dev; 1024 kaweth->net = netdev; 1025 1026 spin_lock_init(&kaweth->device_lock); 1027 init_waitqueue_head(&kaweth->term_wait); 1028 1029 dbg("Resetting."); 1030 1031 kaweth_reset(kaweth); 1032 1033 /* 1034 * If high byte of bcdDevice is nonzero, firmware is already 1035 * downloaded. Don't try to do it again, or we'll hang the device. 1036 */ 1037 1038 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) { 1039 dev_info(&intf->dev, "Firmware present in device.\n"); 1040 } else { 1041 /* Download the firmware */ 1042 dev_info(&intf->dev, "Downloading firmware...\n"); 1043 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL); 1044 if ((result = kaweth_download_firmware(kaweth, 1045 "kaweth/new_code.bin", 1046 100, 1047 2)) < 0) { 1048 err("Error downloading firmware (%d)", result); 1049 goto err_fw; 1050 } 1051 1052 if ((result = kaweth_download_firmware(kaweth, 1053 "kaweth/new_code_fix.bin", 1054 100, 1055 3)) < 0) { 1056 err("Error downloading firmware fix (%d)", result); 1057 goto err_fw; 1058 } 1059 1060 if ((result = kaweth_download_firmware(kaweth, 1061 "kaweth/trigger_code.bin", 1062 126, 1063 2)) < 0) { 1064 err("Error downloading trigger code (%d)", result); 1065 goto err_fw; 1066 1067 } 1068 1069 if ((result = kaweth_download_firmware(kaweth, 1070 "kaweth/trigger_code_fix.bin", 1071 126, 1072 3)) < 0) { 1073 err("Error downloading trigger code fix (%d)", result); 1074 goto err_fw; 1075 } 1076 1077 1078 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) { 1079 err("Error triggering firmware (%d)", result); 1080 goto err_fw; 1081 } 1082 1083 /* Device will now disappear for a moment... */ 1084 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n"); 1085 err_fw: 1086 free_page((unsigned long)kaweth->firmware_buf); 1087 free_netdev(netdev); 1088 return -EIO; 1089 } 1090 1091 result = kaweth_read_configuration(kaweth); 1092 1093 if(result < 0) { 1094 err("Error reading configuration (%d), no net device created", result); 1095 goto err_free_netdev; 1096 } 1097 1098 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask); 1099 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1)); 1100 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size)); 1101 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n", 1102 (int)kaweth->configuration.hw_addr[0], 1103 (int)kaweth->configuration.hw_addr[1], 1104 (int)kaweth->configuration.hw_addr[2], 1105 (int)kaweth->configuration.hw_addr[3], 1106 (int)kaweth->configuration.hw_addr[4], 1107 (int)kaweth->configuration.hw_addr[5]); 1108 1109 if(!memcmp(&kaweth->configuration.hw_addr, 1110 &bcast_addr, 1111 sizeof(bcast_addr))) { 1112 err("Firmware not functioning properly, no net device created"); 1113 goto err_free_netdev; 1114 } 1115 1116 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) { 1117 dbg("Error setting URB size"); 1118 goto err_free_netdev; 1119 } 1120 1121 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) { 1122 err("Error setting SOFS wait"); 1123 goto err_free_netdev; 1124 } 1125 1126 result = kaweth_set_receive_filter(kaweth, 1127 KAWETH_PACKET_FILTER_DIRECTED | 1128 KAWETH_PACKET_FILTER_BROADCAST | 1129 KAWETH_PACKET_FILTER_MULTICAST); 1130 1131 if(result < 0) { 1132 err("Error setting receive filter"); 1133 goto err_free_netdev; 1134 } 1135 1136 dbg("Initializing net device."); 1137 1138 kaweth->intf = intf; 1139 1140 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1141 if (!kaweth->tx_urb) 1142 goto err_free_netdev; 1143 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 1144 if (!kaweth->rx_urb) 1145 goto err_only_tx; 1146 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL); 1147 if (!kaweth->irq_urb) 1148 goto err_tx_and_rx; 1149 1150 kaweth->intbuffer = usb_alloc_coherent( kaweth->dev, 1151 INTBUFFERSIZE, 1152 GFP_KERNEL, 1153 &kaweth->intbufferhandle); 1154 if (!kaweth->intbuffer) 1155 goto err_tx_and_rx_and_irq; 1156 kaweth->rx_buf = usb_alloc_coherent( kaweth->dev, 1157 KAWETH_BUF_SIZE, 1158 GFP_KERNEL, 1159 &kaweth->rxbufferhandle); 1160 if (!kaweth->rx_buf) 1161 goto err_all_but_rxbuf; 1162 1163 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr)); 1164 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr, 1165 sizeof(kaweth->configuration.hw_addr)); 1166 1167 netdev->netdev_ops = &kaweth_netdev_ops; 1168 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT; 1169 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size); 1170 SET_ETHTOOL_OPS(netdev, &ops); 1171 1172 /* kaweth is zeroed as part of alloc_netdev */ 1173 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl); 1174 usb_set_intfdata(intf, kaweth); 1175 1176 #if 0 1177 // dma_supported() is deeply broken on almost all architectures 1178 if (dma_supported (&intf->dev, 0xffffffffffffffffULL)) 1179 kaweth->net->features |= NETIF_F_HIGHDMA; 1180 #endif 1181 1182 SET_NETDEV_DEV(netdev, &intf->dev); 1183 if (register_netdev(netdev) != 0) { 1184 err("Error registering netdev."); 1185 goto err_intfdata; 1186 } 1187 1188 dev_info(&intf->dev, "kaweth interface created at %s\n", 1189 kaweth->net->name); 1190 1191 dbg("Kaweth probe returning."); 1192 1193 return 0; 1194 1195 err_intfdata: 1196 usb_set_intfdata(intf, NULL); 1197 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1198 err_all_but_rxbuf: 1199 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1200 err_tx_and_rx_and_irq: 1201 usb_free_urb(kaweth->irq_urb); 1202 err_tx_and_rx: 1203 usb_free_urb(kaweth->rx_urb); 1204 err_only_tx: 1205 usb_free_urb(kaweth->tx_urb); 1206 err_free_netdev: 1207 free_netdev(netdev); 1208 1209 return -EIO; 1210 } 1211 1212 /**************************************************************** 1213 * kaweth_disconnect 1214 ****************************************************************/ 1215 static void kaweth_disconnect(struct usb_interface *intf) 1216 { 1217 struct kaweth_device *kaweth = usb_get_intfdata(intf); 1218 struct net_device *netdev; 1219 1220 dev_info(&intf->dev, "Unregistering\n"); 1221 1222 usb_set_intfdata(intf, NULL); 1223 if (!kaweth) { 1224 dev_warn(&intf->dev, "unregistering non-existent device\n"); 1225 return; 1226 } 1227 netdev = kaweth->net; 1228 1229 dbg("Unregistering net device"); 1230 unregister_netdev(netdev); 1231 1232 usb_free_urb(kaweth->rx_urb); 1233 usb_free_urb(kaweth->tx_urb); 1234 usb_free_urb(kaweth->irq_urb); 1235 1236 usb_free_coherent(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle); 1237 usb_free_coherent(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle); 1238 1239 free_netdev(netdev); 1240 } 1241 1242 1243 // FIXME this completion stuff is a modified clone of 1244 // an OLD version of some stuff in usb.c ... 1245 struct usb_api_data { 1246 wait_queue_head_t wqh; 1247 int done; 1248 }; 1249 1250 /*-------------------------------------------------------------------* 1251 * completion handler for compatibility wrappers (sync control/bulk) * 1252 *-------------------------------------------------------------------*/ 1253 static void usb_api_blocking_completion(struct urb *urb) 1254 { 1255 struct usb_api_data *awd = (struct usb_api_data *)urb->context; 1256 1257 awd->done=1; 1258 wake_up(&awd->wqh); 1259 } 1260 1261 /*-------------------------------------------------------------------* 1262 * COMPATIBILITY STUFF * 1263 *-------------------------------------------------------------------*/ 1264 1265 // Starts urb and waits for completion or timeout 1266 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length) 1267 { 1268 struct usb_api_data awd; 1269 int status; 1270 1271 init_waitqueue_head(&awd.wqh); 1272 awd.done = 0; 1273 1274 urb->context = &awd; 1275 status = usb_submit_urb(urb, GFP_NOIO); 1276 if (status) { 1277 // something went wrong 1278 usb_free_urb(urb); 1279 return status; 1280 } 1281 1282 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) { 1283 // timeout 1284 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n"); 1285 usb_kill_urb(urb); // remove urb safely 1286 status = -ETIMEDOUT; 1287 } 1288 else { 1289 status = urb->status; 1290 } 1291 1292 if (actual_length) { 1293 *actual_length = urb->actual_length; 1294 } 1295 1296 usb_free_urb(urb); 1297 return status; 1298 } 1299 1300 /*-------------------------------------------------------------------*/ 1301 // returns status (negative) or length (positive) 1302 static int kaweth_internal_control_msg(struct usb_device *usb_dev, 1303 unsigned int pipe, 1304 struct usb_ctrlrequest *cmd, void *data, 1305 int len, int timeout) 1306 { 1307 struct urb *urb; 1308 int retv; 1309 int length = 0; /* shut up GCC */ 1310 1311 urb = usb_alloc_urb(0, GFP_NOIO); 1312 if (!urb) 1313 return -ENOMEM; 1314 1315 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data, 1316 len, usb_api_blocking_completion, NULL); 1317 1318 retv = usb_start_wait_urb(urb, timeout, &length); 1319 if (retv < 0) { 1320 return retv; 1321 } 1322 else { 1323 return length; 1324 } 1325 } 1326 1327 module_usb_driver(kaweth_driver); 1328